Mouthpiece



FIG. 1 is a perspective view from above of the invention;

FIG. 2 is a side elevational view of the invention;

FIG. 3 is another side elevational view of the invention taken at 90° to the view of FIG. 2; and,

FIG. 4 is a top view of the invention.

The broken line showing of parts of the drawings is included for the purpose of illustrating use and environment and forms no part of the claimed design. 

CLAIM The ornamental design for a mouthpiece, as shown and described. 